File: objc_failable_inits.swift

package info (click to toggle)
swiftlang 6.1.3-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,532 kB
  • sloc: cpp: 9,901,743; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (32 lines) | stat: -rw-r--r-- 1,066 bytes parent folder | download | duplicates (2) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck %s -verify

// REQUIRES: objc_interop

import Foundation

func testDictionary() {
  // -[NSDictionary init] returns non-nil.
  var dictNonOpt = NSDictionary()
  _ = dictNonOpt! // expected-error {{cannot force unwrap value of non-optional type 'NSDictionary'}}
}

func testString() throws {
  // Optional
  let stringOpt = NSString(path: "blah", encoding: 0)
  _ = stringOpt as NSString // expected-error{{value of optional type 'NSString?' must be unwrapped to a value of type 'NSString'}}
  // expected-note@-1 {{coalesce using '??' to provide a default when the optional value contains 'nil'}}
  // expected-note@-2 {{force-unwrap using '!' to abort execution if the optional value contains 'nil'}}

  // Implicitly unwrapped optional
  let stringIUO = NSString(path: "blah")
  if stringIUO == nil { }
  _ = stringIUO as NSString?
  let _: NSString = NSString(path: "blah")
}

func testHive() {
  let hiveIUO = Hive()
  if hiveIUO == nil { }
  _ = hiveIUO as Hive?
  let _: Hive = Hive()
}